81211688 (number)

81211688 is an even 8-digits composite number following 81211687 and preceding 81211689. In scientific notation, it is written as 8.1211688 × 10^7. The sum of its digits is 35. It has a total of 5 prime factors and 16 positive divisors. There are 39839488 positive integers (up to 81211688) that are relatively prime to 81211688.

Interesting facts

Basic properties

Name

Name eighty-one million two hundred eleven thousand six hundred eighty-eight

Notation

Scientific notation 8.1211688 × 10^7
Engineering notation 8.1211688 × 10^6

Prime Factorization of 81211688

Prime Factorization 2 × 2 × 2 × 53 × 191537

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 5
Total number of prime factors
rad Radical 20302922
Product of the distinct prime numbers

The prime factorization of 81211688 is 2 × 2 × 2 × 53 × 191537. Since it has a total of 5 prime factors.

Most popular turbo-numbers

8, 6, 18, 9, 155, 91, 6495, 3803, 32306, 87392, 605707, 704457, 1793434, 794943, 66823177, 19096053, 244700492, 613373421, 9488945606, 3649249249

Basic calculations (n = 81211688)

Multiplication

n×y
n×2 162423376
n×3 243635064
n×4 324846752
n×5 406058440

Division

n÷y
n÷2 40605844
n÷3 27070562.666667
n÷3 20302922
n÷5 16242337.6

Exponentiation

ny
n2 6595338267809344
n3 5.3561855365979E+23
n4 4.349848686683E+31
n5 3.5325855439011E+39

Nth Root

y√n
2√n 9011.7527706878
3√n 433.05146534681
4√n 94.930252136439
5√n 38.187718058893

Divisors of 81211688

1, 2, 4, 8, 53, 106, 212, 424, 191537, 383074, 766148, 1532296, 10151461, 20302922, 40605844, 81211688

16 divisors

τ Total Divisors 16
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81211687
Sum of the proper positive divisors of n
A Arithmetic Mean 0.0625
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 16
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81211688 can be divided by 16 positive divisors. The sum of these divisors (counting 81211688) is 1, the average is 0.0625.

Base conversion 81211688

Base System Value
2 Binary 100110101110011000100101000
3 Ternary 12122210222111022
4 Quaternary 10311303010220
5 Quinary 131242233223
6 Senary 12020352012
8 Octal 465630450
10 Decimal 81211688
12 Duodecimal 23245608
16 Hexadecimal 4d73128
20 Vigesimal 157b948
36 Base36 1ccnc8

Cryptographic Hash Functions

md5 5ec1528ed07151bc42b0c8df9c10999c
sha1 5368a36367eeb167f90612c8f0733f16c40f3030
sha256 d6fb20c914a2772dea4254f62bc741139ad98308bd54ed07be9892741381e118
sha512 3bff03d7e8462965b31d908963a496676f4898a2698f048eed4cf5b0db657464e760d77127cc00f12834fabec42d0ebbb5f249e2ca869922a71186578ca76d12
ripemd-160 af52a4b60f79f86de973cc382e0792d405362d64

81211688 as geometric shapes

Circle

Radius = n
Diameter 162423376
Circumference 510268084.81285
Area 2.0719866250089E+16

Sphere

Radius = n
Volume 2.243593751072E+24
Surface area 8.2879465000358E+16
Circumference 510268084.81285

Square

Length = n
Perimeter 324846752
Area 6595338267809344
Diagonal 114850670.59281

Cube

Length = n
Surface area 39572029606856064
Volume 5.3561855365979E+23
Space diagonal 140662769.78443

Equilateral Triangle

Length = n
Perimeter 243635064
Area 2.8558652432373E+15
Altitude 70331384.892216

Triangular Pyramid

Length = n
Surface area 2.8558652432373E+15
Volume 6.3123251903695E+22
Height 38283556.864271